To insert the micro sign or mu letter (sometimesincorrectly called a mew symbol) in a Word document, you havedifferent ways:

I. Using the Symbol font:

The symbols that you see on your keyboard are easy to use as they are visible. However, when it comes to the “hidden” symbols, there are three ways to make them: using the Insert option in word processors, using the Windows Character Map, and using the Alt key. There are essentially two Greek alphabets, which in modern times have been combined. The first is the truly ancient alphabet, consisting of the capital letters we are all familiar with, like Σ (sigma), Ω (omega) and Θ (theta). How to insert lambda, sigma, theta and other Greek symbols in Word. If you click Ctrl Shift Q twice, Word does not switch to the previous font, and the Symbol font. To turn on or turn off the AutoCorrect of the Math symbols, do the following. In windows there is a charmap utility. Run it, locate the symbol you want, click select, then copy, and then in word paste it.

This method is very useful when you need to insert symbols rarely andit works only for Latin or Greek letters.

Anytime, when you type the text in the Word document, you can switch to the Symbolfont and use the corresponding Latin letters to enter Greek letters:

1. Click Ctrl+Shift+Q to switch your currentfont to the Symbol font.

2. Use symbols like normal font (e.g. in Symbolfont keyboard button 'a' equals Greek letter 'α', keyboard button 'b'equals Greece letter 'β', ..., 'l' ->'λ', 'm' ->'μ',..., 'w' -> 'ω', etc.):

Note: This method works for inserting only one letter. Thus, if you want toinsert several symbols, you need to repeat these steps for each insertion.

After entering one letter using the Symbol font, the next character is entered usingthe previous font.

If you click Ctrl+Shift+Q twice, Word does not switch to the previous font, and theSymbol font doesn't stop to work after the first entered symbol. Thus, you will needto change the current font and style later.

II. Using the Equation:

This way is perfect if you don't need to care about the format and compatibilitywith previous versions of Microsoft Office (a recommended approach for physicalscience and mathematics, which require a lot of math in the text with consistentfonts for all equations and symbols):

1. In the paragraph where you want to insert thesymbol, click Alt+= to insert the equitation block:

2. In the equitation block without any additionalefforts, you can enter any letter that you need just by typing+Name of the letter:

III. Using AutoCorrect for Math:

When you work with many documents and often need to paste one specialsymbol, you may not want to insert an equation each time. Microsoft Word offers ahelpful feature named AutoCorrect. The AutoCorrect options in MicrosoftWord propose two different ways to quickly add any special character, such as amicro sign or mu letter from the Greek alphabet, or evenlarge pieces of text:

UsingtheReplace text as you type function of the AutoCorrect options.
Using the Math AutoCorrect options:

Using this method, you can benefit the Math AutoCorrect options without inserting anequation. To turn on or turn off the AutoCorrect of the Math symbols, do thefollowing:

1. On the File tab, click Options:

2. In the Word Options dialog box, on theProofing tab, click the AutoCorrect Options... button:

3. In the AutoCorrect dialog box, on theMath AutoCorrect tab, select the Use Math AutoCorrect rules outside of the math regionsoption:

After clicking OK, you can use any of the listed Names of symbols andMicrosoft Word will replace them to the appropriate symbols:

Note: If you don't need the last replacement, click Ctrl+Z to cancel it.

IV. Using a shortcut key:

Microsoft Word provides a way to define the shortcut key for the most often usedfunctions. Thus, you can assign a shortcut for inserting the micro sign:

1. On the Insert tab, in the Symbols group,click the Symbol button:

Note: If you use the character very often, you will find it in the Symboldropdown list:

2. Click More Symbols....

Sigma Symbol In Word 2007

3. On the Symbol dialog box:

To insert the micro sign from the current font (if exist), from theSubset dropdown list, select the Greek and Coptic:
To insert the micro sign from the Symbol font, from theFont dropdown list, choose the Symbol font:

4. Choose the symbol and click the Shortcut Key...button to open the Customize Keyboard dialog box:

5. In the Press new shortcut key field, type the keycombination that you want to use for the symbol or character (e.g., for symbol μ usedAlt+M) and click Assign.

Sigma Symbol Microsoft Word 2007

Note: Be careful, you can reassign the assigned already shortcuts in Word. Besure, that after Current assign to: there are no active Word functions. In any case,you can reassign any existing function in Word to a different key.

Sigma Symbol In Word 2010

Insert Sigma Symbol In Word

See also this tip in French:Comment insérer un symbole micro ou une lettre mu dans Word.